Magneto-electric generator.



' G."110N0LD 3 MAGNETfELEGTRIG GENERATOR. l. APPLICATION FILED AUG. 2B, 190B.

7. 'INVNTUR 4MM 'M #FURNEYS WlTNESSEs.

G. HON O LD. v MAGNETD-ELEGTRIG GENERATOR.

APPLICATION FILED AUG. 281906. 974,967. j

Patented Nov.8, 1910.

4 gums-SEHEN.

unirsi) sfrnrns rnrinvr onrion.

GOTTLOB HONQLES, UF STUTTGART, GEB'MLNY.

MGNET-ELECTRIC GENERATOR.

Specification of Letters Patent.

Patented Nov. 8, iti.

.f Application filed August 28, i908. Serial No. 332,326.

To all whom may erinnern:

scription oit the invention, such ns will enable others skilled in the nrt to which it uppertuins to make and use the seine.

My inventlon rei'crs to ignition devices for explosion engines end more specilienlly "to a special design of explosion engine that is frequently used for driving motor ears and motor bicycles. In such vehicles it is usual to employ motors in which two cylinders octupon n connnon crunk, both cylinders being placed in the pinne ot the crank und converging nnvnrd' the crunk shaft. lt' in engines oi this kind, the two lCylinders nre to not in turns, it is evident that consecutive ignitions nuist not follow each other ut equal. intervals of time, br.- cause in order to arrive at the point ot maximum compression which the point in Which the ignition should take piene, the crank must once pass tln'ough en ongle ot 3604-030 and the ,next time through un :ingle of 2h30-:cc it theungle inclosed by the ones of the two cylinders 's culled fe.

My invention in its specilic embodiment,

Vconsists in giving the armature und field iron ot n sparking magneto such o shape that the .innxinnun electric tension develolnnl by the magneto .is ud-vnneed :nid retarded in turns in every half revolution or" the magneto armature so us to correspond with the requiren'ients of the motor.

In the drawings, Figure l un end vieuT of the main ports of the motor und igniting magneto showing the connections ot the cylinders with the erunlr and ot' the crunl; shnftwith the nnigneto shaft; Fig. 2 isn longitudinal section through the inugiieto alone; and Fig. 3 n section on lint` SW3 ot Fig. 2 looking in the direction of the arrow; Figs. l and 5 nre dingrnnnnnti ul soctioiel representations of the combined motor und magneto in the tivo positions Corresponding to the moments of ignition, the plane et the section being indicated by the line ilevl and arrow in lFig. 2; Fig. is it diagram-- maticol longitudinal section leid through the `magneto on line 6 6 of l0, the armature, however, having its opposite ends 7 und 8 are diagrammntical sections laid through the field and armature iron of the magneto on llnes 7 --7 and 8 8 oit FlgrlG,

'res oectivel `the armature a oeorin in o proximotely a horizontal position in Figs. (5, 7 and', and Figs. 7 und 8 showing an armature which rs T-shaped :it its opposite ends; Fig. Q is o diagram illustrating the curve of electric tension produced by o insgfneto li'nving on ordinarily shaped airmaiture and vthe tension produ'eed by the meg neto having the lield sindy armature iron shaped according to my invention, showing the displacement oit' the curve of electrical tension produced by the latter arrangement; Fig. l0 is view showing the ermzttrtre and the field pole pieces/ in perspective, and illust-rating n Tmhaped construction, the lines 6 6, 7H?, and 8-8 on this ligure denoting the planes in which Figs, G, 7 and 8, respectively, are laid.

rEhe reference letters represent similar parts in all the ignres.

@n n easing H the two cylinders L1 and L, -(ire mounted in the usual manner, that is to suv their axes are placed in i common pla-ne and embrace an siente angle, which is hereinufter designated by 0c. In the cyl indcrs the pistons K, and K, vare arranged to slide up and down and by ineens ot the piston rods R, and R, to transmit the :torce generated in the cylinders to the common crunk G. The crank shaft CS is connected by :1. suitable trein of gearing G with the shutt Q. ot' :i magneto l, the gearing being in the usuel nmnner dimensioned so as to maire the i'nagneto armature perform one revolution for every two revolutions o the crank shaft.

Refeiu'ing to Fig, 2, Q is the shaft of the magneto supporting en iron core A. The core A is provided with pole-pieces Ps and Pn. und to the shape of these pole-pieces more especially my invention refers. ln a section taken on the lines SM-3 of Fig.. 2, the upper pole piece Ps will present s complete segment in @ross-section, While the points of the lower pole piece Pn Will appear out unf'ny, shown in Figs.- 3 and 7. With the ports in the same position, n section teilten on. the line of liig; 2 will show the lower `pole piece Pn :is e. complete segment, While the points of the upper pole piece 13S Will appear eut arroyos shown in Fig. 8. This peculiar Aoutline 1s due to the tact that the entirely out away on opposite sides; Figs.`

pole pieces are each reduced in width at one end, as shown very clearly in Fig. l0, the narrow half of one pole iece being arranged opposite the wide hal of/the other pQle piece. In the`pr'efe'rred construction, as shown in Fig. 10, one half of each pole piece has its proecting edges entirely removed. The corresponding portions of .the opposite pole pieces are on opposite sides of a plane extending through the center of the armae ture axis, and the winding WV is common to both poles.

The armature rotates between the pole-pieces N and S of a iield magnet L and these pole-pieces are likewise m'utilated or cutaway on opposite sides of a plane laid through the middle 'of the armature and perpendicular to its axis, as is shown in.

Figs. 3, 7, 8 and 10. In Fig. G the lines of force are indicated by dotted lines andfit will be seen that owing to the mutilation'o` the pole-pieces they pass obliquely throughthe armature, the travel, of course', being from one complete pole-piece tothe opposite one. -Asthe maximum of induction will take place at the moment in which the lines l advanced as the case may be.

lthe maximum of induction is obtained.

igs. 4: and 5 represent sections of the rrfotor combined with the magneto on line of Fig. Q- in the two positions in which the drawings, the motor illustrated is of the four-cycle type, but it will be understood, of course, that tlie invention may be applied to an engine having a different cycle ot' operations, the particular engine cycle being a mere matter of choice. In the position shown in Fig. 4, the piston l, is at full compression and thearniature is at a point of maximum tension. The charge in the cylinder L being explodechthe crank shattwill'be rotated in the direction indicated by the arrow in F t to eii'cct a discharge ot the'burned gas "'om the cylinder L, and draw a fresh charge into the same. Then the crank shaft has-rotated 180C, the piston K2 will be at the end ot its working stroke and the magneto armature will be at a point of inaction, having made one/fourth of a revolution. A further advance of the crank shaft through ai@ will. complete the suction stroke and begin the compression stroke ot the piston K1, and a still further advance ot' the crank shaft through 18()O will cause the said piston l to complete its compression stroke whereupon the cylinder L1 will be ready for ignition. The magneto armature will simultaneously have advanced an additional crank shaft to rotatevBGOO-{mo and 36W-mO respectively, the armature passing correspondingly through/v In thewrst'position, Fig. 4, it will be seen thatthe complete part of the pole-piece Pa is just. registering with the `forward air gap between the pole-pieces S of the field magnet Il. Since the air gap between the pole ,pieces of the ield-magnet on the other half lof the magneto, placed in Figs. 4 and :3 away from the observer, are shifted to the right from the center by the mutilation of i the pole-pieces indicatedby dotted lines in f the drawing, the complete part of the other pole-piece Ps oit the armature is also atthis 1 point bridgingv the back portion of the lower ln l air gap. The complete parts of the arma- -ture pole-pieces are, therefore, in a position to induce a maximum of tension in the armature winding, the lines of force passing'v the lower rear pole piece, lwill be readily obliquelylfrom the upper front pole piece to in the direction indica ted by the arrow in Figs. 4 and the tension induced in the winding will first decrease and then again increase, until the armature has reached the position shownin Fig. 5, pole-piece Pn registering with the lower air gap "pf the side of the magneto facing the observer and pole-piece P5 registering with the upper air gap of the side turned a *ay from the observer. This, therefore, is again a position of maximum induction corresponding tothe position of maximum compression of cylinder L1` as shown in Fig. 5, the lines of force now running obliquely from the upper rear pole pie'ce tothe lower frontpolc-piece. It

is also seen that, in order to proceed troni -the position shown in Fig. 4 to the position Shown in Fig. 5, the armature has to traverse corresponding -to a march of the motor crank, C, 'through an angle of (360s-:ws

and in order to -return from the position shown in Fig. 5, to the position shown m Fig. 4, the armature hasto cover an angle of only a, O l C 8O 2)/ corresponding to angle of (36th-03)@ traversed simultaneously by the crank.

In Fig. t), the curve representing the electric pressure produced by an armature core of the usual I-shaped section is shoivn by a dotted line and the pressure curve produced by an armature core and iield magnet mutilated according to my invention is shown by a full line, the angle of displaeen'ient ot the point of maximum induction being indicated.

'It Will be understood, of course, that an igniter is provided in the end of each cylinder and -these igniters are electrically connected ivith a distributer disk D which is carried by but insulated from the armature shaft. This distributer is in circuit with the armature and directs the current alternately to conductors leading from its opposite sides, so as `to energize the-ignition circuits alternately, the return of each circuit being through the metal parts ot the engine and magneto.

Having thus fully described my invention, ivliat'I claim is 1. The combination ivitli a dynamo electric generatorhaving means for producing a plurality of substantially equal inaxii'num' rates of changeof flux at 4alternately longer and shorter intervals, of ignition circuits arranged to be energized by said changes of tlu'x, and two explosive engines having iiiters Within the ignition circuits and ranged in intersecting planes.

2. The combination with tivo, explosive igar- Gil gines having the axes of their cylinders iii- Qlined to each other, said engines being provided with igniters, of an electric generator having its armature driven by and at a fixed speed with relation to the engine, and having generator windings. means for producing an intern'iittent maximum rate of change of Hux through the generator coils at alternately loiiiger and shorter angular intervals corresl'ionding to the angular intervals between the times of ignition and ignition cir-A cuits including the generator windings and. the respective ignition devices of the engine, whereby a maximum voltage is produced at the igniter ot'eacli engine at the time of ignition.

3. tn a magneto electric generator, the combination ivitli a rotatable armature having pole-pieces reduced on opposite sides ot a, plane perpt-indicular to the axis of the armature, the reduced portions ot' the pole pieces being on diau'ietrically oiiposite sides ot the axis, ot a iield magnet having polepieces reduced on opposite sides of a plane iierpendiculal' tothe axis'otl the armature,

the reduced portions of the pole-pieces being' on opposite sides ot the axis, and an armature winding on said armature.

4t.v In a magneto electric generator, the combination With a rotatable armature having pote-pieces reduced on opposite sides ot a pia-ne perpeiidicnlar to the axis out the armature, of a tield magnet having pole pieces reduced on opposite sides ot. a plane perpendicular to the axis of the armature, the reduced portions of the pole-pieces being on' opposite sides ot' the axis` an armature coil, and means Vtor taking ott' the current as set forth.

5. ln a magneto electric generator, the combination with a rotatable armature having pole-pieces with parts of unequal width, toi-ming' wide and narrow portions disposed on opposite sides ot a plane perpendicular to the axis of the armature, the Wide portion of one pole-piece being diametrically opposite to the narrowv portion ot the other pole-piece. ot' a field magnet having poleiieces with parts of unequal width, forming iv'ide and arron' portions disposed on opposite sides ot a plane perpendicular to the axis ot the armature with the Wide portion oit one pole-piece tacingthe narrow portion oi. the other pole-piece, an armatiire Winding', and means tor leading off the currenttherefrom. i

(3. ln a magneto electric generator` the combination Awith a rotatable armature having pole-pieces with reduced and non-reduced portions disposet'l on opposite sides of a plane pei-pendicular to the axis of the armature` the reduced portions ot' each polepiece being respectively diametrically opposite to the non-reduced port-ions of the other iviolepieces, ot a Field magnet having polepieees with T-shaped faces, the Wide portions ot the faces which torni the heads of -the Ts being disposed on opposite sides of a of the axis, ot a'tield magnet, having pole-4 pieces reduced on opposite sides of a plane perpendicular to the axis of the armature, the reduced portions of the pole pieces beingl on diametrically opposite sides of the axis, the relative disposition of the armature 'pole pieces and theeld magnet pole pieces be- Aing such that the maximum electric effect takes place at intervals which are alternately relatively longer and shorter, an ar mature winding, and means for leading off the current therefrom.

8. In a magneto electric generator, the combination. With a rotatable armature having pole pieces reduced on opposite sides of a plane perpendicular to the axis of the armature, of a field 4magnet having pole-pieces reduced on opposite Sides of a plane perpendicular to the axis of the armature, the reduced portions of thevpole-pieces being on diametrically opposite sides of the axis, the relative disposition oi the armature polepieces and the field magnet pole pieces being such that the maximum electric effect .takes y place at intervals which are alternately relatively longer and shorter, an armature coil, and means for taking 0H the current.

In testimony whereof I have hereunto affixed my signature in the presence of two witnesses.

eoTTLoB HoNoLD.

Witnesses RUDOLF KLEIN, ERNST ENTEMANN. 

